"Encryption is the process of encoding messages or information in such a way that only authorised parties can read it. Encryption does not of itself prevent interception, however, it denies the message content to the interceptor. In an encryption scheme, the intended communication information or message, referred to as plain text, is encrypted using an encryption algorithm, generating cipher text that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. It is in principle possible to decrypt the message without possessing the key, so, for a well-designed encryption scheme, large computational resources and skill are required. An authorised recipient can easily decrypt the message with the key provided by the originator to recipients, and not to unauthorised interceptors."